>Cryptocurrencies have the potential to greatly improve the financial system by making it simpler, fairer and more transparent. When anyone will be able to launch their own cryptocurrency, we will have a chance to free ourselves from the coercive influences of debt, venture capital and corporations.
When "anyone will be able to launch their own cryptocurrency" it will become completely useless. This is what many technical folks who don't understand economics don't see. The utility of fiat is twofold - first of all, real guns, missiles, tanks, and planes are protecting your fiat dollars. Technical cryptobulls (and non-technical crypto mega-bulls) seem to miss this point entirely.
A corollary to this is a world with only cryptocurrency invites chaos. If we're all being paid in crypto, and crypto is anonymous, what incentive does one have to pay taxes to the government? No one will pay. Or some might, but others won't, and it will be the burden of the few taxpayers to subsidize the taxes of the many who skip out.
>chance to free ourselves from the coercive influences of debt, venture capital and corporations.
Yes, you'll also be freeing yourself from the influences of public roads, highways, and public schools. You'll free yourselves from the coercive influence of venture capital and corporations and governments/banks (latter is implied) and we'll free ourselves straight into an anarchic/chaotic society.
Second, a central entity (or a few entities) determining an agreed-upon exchange rate between various fiat currencies keeps the system running without severe loss of efficiency. We already see highly illiquid, inefficient markets in cryptospace. Sure, people should be able to launch their own toy cryptocurrencies for fun purposes, but it will have zero utility.
This will not be fixed by adding MORE cryptocurrencies - it will only exacerbate the problem. This will be fixed by adding more users to a basket of existing cryptocurrencies. Crypto/blockchain certainly have powerful use cases but to decry fiat as some extraordinary evil which should be 100% supplanted by cryptocurrency is, quite frankly, a display of a lack of understandings of economics, sociology, civics, and what have you.